Multi-locus variable-number tandem repeat analysis for outbreak studies of Salmonella enterica serotype Enteritidis

Table 1 Characteristics of VNTR loci selected for MLVA

Locus name (locus name in Boxrud et al. [12])	Repeat size (bp)	No. of repeats in strains		Region
		NCTC 13349^a	07–2642^b
SENTR1 (SE-10)	45	7.8	7.8	tolA
SENTR2^c	39	9.3	9.3	ftsK
SENTR3	93	4.4	4.4	STM1457 homologue
SENTR4 (SE-1)	7	4.9	4.9	Putative bacteriophage tail protein, STY631a homologue
SENTR5 (SE-5)	6	10.0	10.0	yohM
SENTR6 (SE-2)	7	5.1	5.1	non-coding
SENTR7 (SE-9)	9	3.1	3.1	ushA
SE-3^d	12	3.0	3.0	non-coding
SE-7^d,e	61³	8.5	8.5	ygbF

^a S. Enteritidis NCTC 13349 [25].
^b number of repeats confirmed by DNA sequencing, DNA sequences identical to NCTC 13349.
^c SENTR2 corresponds to Locus STTR7 in Lindstedt et al. [22].
^d adapted from Boxrud et al. [12].
^e repeat units consist of a 29 bp highly conserved 5'-sequence and a 32 bp variable 3'-sequence.

ISSN: 1471-2180